Printed plastics? So 2011. And high-end printers have been working with metals and ceramics for some time. But now, the 3-D printing community is toying with a material more natural in origin: printed wood. A Thingiverse member going by the nom de printer "Kaipa" recently uploaded pictures of 3-D printed parts that weren't made of extruded plastic, but a wood/plastic mixture he created on his own